What does it mean if erythrocytosis is detected during a physical examination?
Disease description:
I went for a medical checkup two days ago and found an increased red blood cell count, which has caused me great concern. Why does an increased red blood cell count occur, as discovered during a physical examination?
Doctor's answer (1)
Dr. Liu Feng
The most common cause of increased red blood cells detected during a physical examination is polycythemia vera, which is a type of myeloproliferative disorder. It results from abnormal proliferation of stem cells in the bone marrow, leading to an increase in multiple cell lines including red blood cells, white blood cells, and platelets. It is often associated with mutations in the JAK2 gene. Patients may be asymptomatic or may experience symptoms such as facial flushing, itching, headache, and blurred vision. Long-term complications may include thrombosis, bleeding, and transformation to leukemia.
Secondary erythrocytosis also exists and is commonly caused by hypoxic conditions, kidney disease, tumors, certain endocrine disorders, and other factors. Chronic lung diseases and sleep apnea syndrome can lead to prolonged hypoxemia, which stimulates the kidneys to produce excessive erythropoietin. Tumors such as renal cell carcinoma and hepatocellular carcinoma can secrete abnormal erythropoietin. Endocrine disorders such as hyperadrenocorticism can also lead to increased red blood cells.
In some cases, erythrocytosis may represent a normal physiological response, for example in residents living at high altitudes, where environmental factors cause compensatory elevation of red blood cell counts.
It is recommended to seek timely medical consultation upon detection of increased red blood cells.
